JPS6234803Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fresh outside air introduction device in an air conditioner for a vehicle such as a large bus.

Generally, fresh outside air is introduced into a bus through a vent equipped with a ventilation fan installed in the ceiling, or by a cooler (or air conditioner) installed under the floor of the vehicle, as disclosed in Publication of Utility Model Publication No. 54-45626. Usually, a fan for introducing outside air is installed in the system, and as the outside air introducing fan rotates, outside air is sucked in from the lower part of the floor or the side wall under the floor.

However, when the ceiling is equipped with a vent with a ventilation fan, the ceiling partially protrudes upward in multiple vents, which not only impairs the appearance, but also makes it difficult to adjust the layout of the vents depending on the user's preference. There is a drawback that it is difficult to obtain a constant ventilation performance because the number of air conditioners is different.Also, in the case of an air conditioner that takes in outside air from the air conditioner section under the floor, the duct from the underfloor to the outlet in the ceiling is long and the duct resistance Therefore, in order to obtain a predetermined ventilation performance, a large-capacity fan must be used, but it has the disadvantage that it is difficult to install a large-capacity fan due to space considerations.

The present invention focuses on the fact that the floor surface of a bus is generally configured in a so-called tiered shape with the rearmost part raised in a step-like manner, and that the last seat is usually installed in the tiered part. By utilizing the space formed between the upper surface of the engine room formed in the lower part and the above-mentioned chick step part and making this space a space for introducing fresh outside air, the interior space of the vehicle can be saved without impairing the appearance. This allows a large amount of outside air to be effectively introduced into the vehicle interior without constricting the interior of the vehicle.The present invention will be described below with reference to embodiments in the accompanying drawings.

In the figure, 1 is a driving engine.
is installed in the engine compartment 2 formed at the rear lower part of the vehicle body.

Reference numeral 3 denotes a floor surface, and the rear part of the floor surface 3 is structured in the form of a stepped tier, and the rearmost seat 5 is installed above the first tier 4' of the chick tier section 4. The rear surface of the backrest 5' of the rearmost seat 5 is configured to lie along the rising surface 4 extending toward the eye 4''.

An outside air suction duct 6 that spans the entire width of the vehicle is formed in the space between the engine compartment 2 and the rear stage section 4. It is divided into a chamber 6'', and the side panels 10 of the vehicle body on both sides of the outside air intake duct 6 are provided with outside air intake ports 8, 8 and outside air intake fans 9,
Fresh outside air can be forcibly introduced into the rear chamber 6' of the outside air suction duct 6 through the outside air intake ports 8, 8 by rotation of the fans 9, 9.

A plurality of blowing fans 11 are provided in the front chamber 6'' of the outside air suction duct 6, and a fan 11 is provided in the front part of the outside air suction duct 6, that is, in the vicinity of the lower part of the first stage 4' of the chick stage part 4, which spans the entire width of the vehicle. A duct 12 is provided, and air in the outside air suction duct 6 is fed into the duct 12 by rotation of the blower fan 11.

Also, both ends of the duct 12 are provided with left and right side plates 1.
The upper end of the rising duct 13 communicates with a blow-off duct 14 formed in the front-rear direction along the ceiling shoulder, and air is blown out by the blower fan 11. Duct 1
2. The air is supplied from the rising duct 13 to the blow-off duct 14 and is blown out into the vehicle interior from the blow-off grill 14' of the blow-off duct 14.

Note that an inside air suction port (not shown) is provided in the second stage 4'' of the chick stage section 4 that forms the upper wall of the outside air suction duct 6, and indoor air is drawn into the rear chamber 6 of the outside air suction duct 6 by rotation of the ventilation fan 11. However, when the outside air intake fan 9 is rotating, the positive pressure of the fan 9 acts on the rear chamber 6'. Therefore, the amount of indoor air taken in is extremely small, and when the outside air intake fan 9 is stopped and only the blower fan 11 is rotating, a large amount of inside air is sucked through the inside air intake port, and air circulation type heating and cooling is performed. In addition, during cooling, the cold air after heat exchange with the heat exchanger 7 is sent to the duct 12, as in the case of ventilation.
It blows out from the riser duct 13 through the blow-off duct 14 and from the blow-off grill 14', but during heating, the warm air after heat exchange in the heat exchanger 7 passes from the duct 12 through the hot air blow-off duct (not shown) and blows into the passenger's lower body. It's starting to blow out towards.

As described above, according to the present invention, the space between the rear stage part of the floor and the engine room below is used, and an outside air intake duct is formed in the space that spans the entire width of the vehicle. By configuring the outside air intake fans installed on the left and right side panels of the duct to draw in outside air from the left and right side panels,
This system can effectively supply a large amount of fresh outside air into the interior of the vehicle without impairing the appearance of the vehicle body or reducing the interior space, especially when applied to large buses with large interior volumes. It can provide sufficient ventilation throughout the room, which can have great practical effects.

Furthermore, when the present invention is applied to a double-decker bus, the tiered section 4 will be formed at the rearmost part of the floor surface of the second floor, so the outside air intake duct 6 formed at the bottom of the tiered section 4 will be The building is located exactly between the first and second floors, and is extremely effective in supplying sufficient fresh outside air to both the first and second floors with an extremely simple duct configuration.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the main part showing an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken from FIG. 1. 1...Engine, 2...Engine room, 3...
...floor surface, 4...chicken step, 6...outside air intake duct, 7...heat exchanger, 8...outside air intake, 9...
Outside air intake fan, 11...Blower fan, 12...
...Duct, 13...Rising duct, 14...Blowout duct.

Claims (1)

[Scope of utility model registration request] In a vehicle such as a bus that has an engine room in which the running engine is installed at the lower rear of the vehicle body, there is a space between the engine room and the stepped part at the rear of the floor that spans the entire width of the vehicle. An outside air intake duct is formed, and an outside air intake fan is provided in each of the outside air intake ports provided on the left and right side panels of the vehicle body on both sides of the outside air intake duct, and
A fresh outside air introduction device for a vehicle air conditioner, characterized in that a blower fan is installed in the outside air intake duct to blow out the air introduced into the outside air intake duct into a room through a blow-off duct.